Wind and solar hybrid energy storage and power generation integration system and process

Abstract

The invention discloses a wind and solar hybrid energy storage and power generation integration system and process. The system comprises a wind power generation subsystem, a solar energy storage subsystem, a liquefied air subsystem and a power subsystem. The process comprises the following steps: solar energy is gathered by a thermal collector to obtain heat energy, the heat energy is stored in heat storge medium; wind energy is converted to electric energy, the wind power is used to liquefy air and stored in the liquefied air; and when electricity is required, the liquefied air is pressurized to recycle cold energy for the air liquefying process, then the air is heated by the high temperature heat storge medium which stores solar energy to obtain high temperature and high pressure air, and finally the air is sent to a multistage reheating turbine to expand and do work. The system of the invention recycles the cold energy of the liquefied air to reduce the wasted work for air liquefying; a pump is used to increase the pressure of the working medium, thus reducing the wasted work for compressing the working medium; the turbine utilizes recycled heat for exhaustm, thus effectively utilizing heat energy; solar energy is utilized to heat the working medium at the inlet of the turbine, thus increasing the expansion efficiency of the turbine; and wind energy and solar energy can be utilized for complementation, energy storage and power generation can be integrated and the system of the invention has wide application prospect.

Description

technical field [0001] The invention relates to the field of green energy technology. Based on the organic integration of wind power generation, liquefied air energy storage, solar heat storage and power cycle, a new energy storage and power generation integrated system and process can effectively realize the complementary utilization of wind energy and solar energy. Background technique [0002] At present, the systems and technologies related to the present invention mainly include: wind power generation, wind-solar hybrid power generation, power energy storage and solar heat storage technology, etc. The development status and characteristics of their respective technologies are as follows. [0003] (1) Wind power generation [0004] Wind power is currently a relatively mature renewable energy power generation technology, and it is also the main way of large-scale development and utilization of wind energy. All countries in the world regard the development of wind power as...

AI Technical Summary

Problems solved by technology

[0022] The purpose of the present invention is to disclose a wind-solar complementary energy storage and power generation integrated system and process, in order to overcome the intermittent and unstable factors of wind energy and solar energy, which lead to the adverse impact of its power generation on the power grid, reduce power grid dispatching and limit wind power Wait for the huge waste caused by the Internet, and solve the existing problems of high cost, low efficiency, short service life, low energy density, geographical constraints or environmental pollution, etc. Problems such as high cost of grid-connected investment in power generation technology and difficulty in large-scale development

Images